"This is nothing personal but i've already done my share of running lower levels to the point where i'm going to pass on anything below level 5."

"I don't particularly want to perpetually re-run levels 1-3, either. Particularly because what happens is this: we run a lower level for someone to get up to OUR level, and as soon as we get them to that level they say "oh, guys - I have to leave. Thanks for the run!"

Actual quotes from my guild forum. We are a laid back, casual guild. The mechanics of FotM this behaviour, and its sad.

It's not slight. Numbers work out to +6% damage output today (berserkers) and if the trend/increase is the same full ascended has a ~38% DPS boost with full Ascended equipment. Backstabs have a possibility of landing for over 18k damage alone on a lvl 80 exotic gear character. There will be true 1 shots, from full health and cd->mug->bs will be enough for anyone not stacking vit/tough... but the 10k heart seekers will be plenty there.